private IQueryable <dynamic> Find(int?IdServico, string dsServico)
        {
            var servicoDAO = new ServicoDAO();
            var list       = servicoDAO.SelectServico(IdServico, dsServico);
            var select     = list.Select(u => new
            {
                IdServico = u.IdServico,
                dsServico = u.dsServico,
                vlServico = u.vlServico
            }).OrderBy(u => u.dsServico).ToList();

            return(select.AsQueryable());
        }